/**
  ******************************************************************************
  * @file     startup_gd32f30x_hd.S
  * @version  v2.0.9
  * @date     2024-06-03
  * @brief    gd32f30x devices vector table for gcc toolchain.
  *           this module performs:
  *           - set the initial sp
  *           - set the initial pc == reset_handler,
  *           - set the vector table entries with the exceptions isr address
  *           - configure the clock system and the external sram to
  *             be used as data memory (optional, to be enabled by user)
  *           - branches to main in the c library (which eventually
  *             calls main()).
  *           after reset the cortex-m4 processor is in thread mode,
  *           priority is privileged, and the stack is set to main.
  ******************************************************************************
  */

  .syntax unified
  .cpu cortex-m4
  .fpu softvfp
  .thumb

.global  g_pfnVectors
.global  Default_Handler

/* start address for the initialization values of the .data section.
defined in linker script */
.word _sidata
/* start address for the .data section. defined in linker script */
.word _sdata
/* end address for the .data section. defined in linker script */
.word _edata
/* start address for the .bss section. defined in linker script */
.word _sbss
/* end address for the .bss section. defined in linker script */
.word _ebss
/* stack used for SystemInit_ExtMemCtl; always internal RAM used */

/**
 * @brief  This is the code that gets called when the processor first
 *          starts execution following a reset event. Only the absolutely
 *          necessary set is performed, after which the application
 *          supplied main() routine is called.
 * @param  None
 * @retval None
*/

    .section  .text.Reset_Handler
  .weak  Reset_Handler
  .type  Reset_Handler, %function
Reset_Handler:

/* Copy the data segment initializers from flash to SRAM */
  movs  r1, #0
  b  LoopCopyDataInit

CopyDataInit:
  ldr  r3, =_sidata
  ldr  r3, [r3, r1]
  str  r3, [r0, r1]
  adds  r1, r1, #4

LoopCopyDataInit:
  ldr  r0, =_sdata
  ldr  r3, =_edata
  adds  r2, r0, r1
  cmp  r2, r3
  bcc  CopyDataInit
  ldr  r2, =_sbss
  b  LoopFillZerobss

/* Zero fill the bss segment. */
FillZerobss:
  movs  r3, #0
  str  r3, [r2], #4

LoopFillZerobss:
  ldr  r3, = _ebss
  cmp  r2, r3
  bcc  FillZerobss

/* Call the clock system initialization function.*/
  bl  SystemInit   
/* Call into static constructors (C++) */
  bl __libc_init_array
/* Call the application's entry point.*/
  bl  main
  bx  lr    
.size  Reset_Handler, .-Reset_Handler

/**
 * @brief  This is the code that gets called when the processor receives an 
 *         unexpected interrupt.  This simply enters an infinite loop, preserving
 *         the system state for examination by a debugger.
 * @param  None     
 * @retval None       
*/
    .section  .text.Default_Handler,"ax",%progbits
Default_Handler:
Infinite_Loop:
  b  Infinite_Loop
  .size  Default_Handler, .-Default_Handler

/******************************************************************************
*
* The minimal vector table for a Cortex M4. Note that the proper constructs
* must be placed on this to ensure that it ends up at physical address
* 0x0000.0000.
* 
*******************************************************************************/
   .section  .isr_vector,"a",%progbits
  .type  g_pfnVectors, %object
  .size  g_pfnVectors, .-g_pfnVectors

g_pfnVectors:
  .word     _estack                           /* Top of Stack */
  .word     Reset_Handler                     /* Reset Handler */
  .word     NMI_Handler                       /* NMI Handler */
  .word     HardFault_Handler                 /* Hard Fault Handler */
  .word     MemManage_Handler                 /* MPU Fault Handler */
  .word     BusFault_Handler                  /* Bus Fault Handler */
  .word     UsageFault_Handler                /* Usage Fault Handler */
  .word     0                                 /* Reserved */
  .word     0                                 /* Reserved */
  .word     0                                 /* Reserved */
  .word     0                                 /* Reserved */
  .word     SVC_Handler                       /* SVCall Handler */
  .word     DebugMon_Handler                  /* Debug Monitor Handler */
  .word     0                                 /* Reserved */
  .word     PendSV_Handler                    /* PendSV Handler */
  .word     SysTick_Handler                   /* SysTick Handler */

  /* External Interrupts */
  .word     WWDGT_IRQHandler                  /* 16:Window Watchdog Timer */
  .word     LVD_IRQHandler                    /* 17:LVD through EXTI Line detect */
  .word     TAMPER_IRQHandler                 /* 18:Tamper through EXTI Line detect */
  .word     RTC_IRQHandler                    /* 19:RTC through EXTI Line */
  .word     FMC_IRQHandler                    /* 20:FMC */
  .word     RCU_CTC_IRQHandler                /* 21:RCU and CTC */
  .word     EXTI0_IRQHandler                  /* 22:EXTI Line 0 */
  .word     EXTI1_IRQHandler                  /* 23:EXTI Line 1 */
  .word     EXTI2_IRQHandler                  /* 24:EXTI Line 2 */
  .word     EXTI3_IRQHandler                  /* 25:EXTI Line 3 */
  .word     EXTI4_IRQHandler                  /* 26:EXTI Line 4 */
  .word     DMA0_Channel0_IRQHandler          /* 27:DMA0 Channel0 */
  .word     DMA0_Channel1_IRQHandler          /* 28:DMA0 Channel1 */
  .word     DMA0_Channel2_IRQHandler          /* 29:DMA0 Channel2 */
  .word     DMA0_Channel3_IRQHandler          /* 30:DMA0 Channel3 */
  .word     DMA0_Channel4_IRQHandler          /* 31:DMA0 Channel4 */
  .word     DMA0_Channel5_IRQHandler          /* 32:DMA0 Channel5 */
  .word     DMA0_Channel6_IRQHandler          /* 33:DMA0 Channel6 */
  .word     ADC0_1_IRQHandler                 /* 34:ADC0 and ADC1 */
  .word     USBD_HP_CAN0_TX_IRQHandler        /* 35:USBD HP and CAN0 TX */
  .word     USBD_LP_CAN0_RX0_IRQHandler       /* 36:USBD LP and CAN0 RX0 */
  .word     CAN0_RX1_IRQHandler               /* 37:CAN0 RX1 */
  .word     CAN0_EWMC_IRQHandler              /* 38:CAN0 EWMC */
  .word     EXTI5_9_IRQHandler                /* 39:EXTI5 to EXTI9 */
  .word     TIMER0_BRK_IRQHandler             /* 40:TIMER0 Break */
  .word     TIMER0_UP_IRQHandler              /* 41:TIMER0 Update */
  .word     TIMER0_TRG_CMT_IRQHandler         /* 42:TIMER0 Trigger and Commutation  */
  .word     TIMER0_Channel_IRQHandler         /* 43:TIMER0 Channel Capture Compare */
  .word     TIMER1_IRQHandler                 /* 44:TIMER1 */
  .word     TIMER2_IRQHandler                 /* 45:TIMER2 */
  .word     TIMER3_IRQHandler                 /* 46:TIMER3 */
  .word     I2C0_EV_IRQHandler                /* 47:I2C0 Event */
  .word     I2C0_ER_IRQHandler                /* 48:I2C0 Error */
  .word     I2C1_EV_IRQHandler                /* 49:I2C1 Event */
  .word     I2C1_ER_IRQHandler                /* 50:I2C1 Error */
  .word     SPI0_IRQHandler                   /* 51:SPI0 */
  .word     SPI1_IRQHandler                   /* 52:SPI1 */
  .word     USART0_IRQHandler                 /* 53:USART0 */
  .word     USART1_IRQHandler                 /* 54:USART1 */
  .word     USART2_IRQHandler                 /* 55:USART2 */
  .word     EXTI10_15_IRQHandler              /* 56:EXTI10 to EXTI15 */
  .word     RTC_Alarm_IRQHandler              /* 57:RTC Alarm */
  .word     USBD_WKUP_IRQHandler              /* 58:USBD Wakeup */
  .word     TIMER7_BRK_IRQHandler             /* 59:TIMER7 Break  */
  .word     TIMER7_UP_IRQHandler              /* 60:TIMER7 Update  */
  .word     TIMER7_TRG_CMT_IRQHandler         /* 61:TIMER7 Trigger and Commutation */
  .word     TIMER7_Channel_IRQHandler         /* 62:TIMER7 Channel Capture Compare */
  .word     ADC2_IRQHandler                   /* 63:ADC2 */
  .word     EXMC_IRQHandler                   /* 64:EXMC */
  .word     SDIO_IRQHandler                   /* 65:SDIO */
  .word     TIMER4_IRQHandler                 /* 66:TIMER4 */
  .word     SPI2_IRQHandler                   /* 67:SPI2 */
  .word     UART3_IRQHandler                  /* 68:UART3 */
  .word     UART4_IRQHandler                  /* 69:UART4 */
  .word     TIMER5_IRQHandler                 /* 70:TIMER5  */
  .word     TIMER6_IRQHandler                 /* 71:TIMER6 */
  .word     DMA1_Channel0_IRQHandler          /* 72:DMA1 Channel0 */
  .word     DMA1_Channel1_IRQHandler          /* 73:DMA1 Channel1 */
  .word     DMA1_Channel2_IRQHandler          /* 74:DMA1 Channel2 */
  .word     DMA1_Channel3_4_IRQHandler        /* 75:DMA1 Channel3 and Channel4 */

/*******************************************************************************
*
* Provide weak aliases for each Exception handler to the Default_Handler. 
* As they are weak aliases, any function with the same name will override 
* this definition.
*
*******************************************************************************/
  .weak NMI_Handler
  .thumb_set NMI_Handler,Default_Handler

  .weak HardFault_Handler
  .thumb_set HardFault_Handler,Default_Handler

  .weak MemManage_Handler
  .thumb_set MemManage_Handler,Default_Handler

  .weak BusFault_Handler
  .thumb_set BusFault_Handler,Default_Handler

  .weak UsageFault_Handler
  .thumb_set UsageFault_Handler,Default_Handler

  .weak SVC_Handler
  .thumb_set SVC_Handler,Default_Handler

  .weak DebugMon_Handler
  .thumb_set DebugMon_Handler,Default_Handler

  .weak PendSV_Handler
  .thumb_set PendSV_Handler,Default_Handler

  .weak SysTick_Handler
  .thumb_set SysTick_Handler,Default_Handler

  .weak WWDGT_IRQHandler
  .thumb_set WWDGT_IRQHandler,Default_Handler

  .weak LVD_IRQHandler
  .thumb_set LVD_IRQHandler,Default_Handler

  .weak TAMPER_IRQHandler
  .thumb_set TAMPER_IRQHandler,Default_Handler

  .weak RTC_IRQHandler
  .thumb_set RTC_IRQHandler,Default_Handler

  .weak FMC_IRQHandler
  .thumb_set FMC_IRQHandler,Default_Handler

  .weak RCU_CTC_IRQHandler
  .thumb_set RCU_CTC_IRQHandler,Default_Handler

  .weak EXTI0_IRQHandler
  .thumb_set EXTI0_IRQHandler,Default_Handler

  .weak EXTI1_IRQHandler
  .thumb_set EXTI1_IRQHandler,Default_Handler

  .weak EXTI2_IRQHandler
  .thumb_set EXTI2_IRQHandler,Default_Handler

  .weak EXTI3_IRQHandler
  .thumb_set EXTI3_IRQHandler,Default_Handler

  .weak EXTI4_IRQHandler
  .thumb_set EXTI4_IRQHandler,Default_Handler

  .weak DMA0_Channel0_IRQHandler
  .thumb_set DMA0_Channel0_IRQHandler,Default_Handler

  .weak DMA0_Channel1_IRQHandler
  .thumb_set DMA0_Channel1_IRQHandler,Default_Handler

  .weak DMA0_Channel2_IRQHandler
  .thumb_set DMA0_Channel2_IRQHandler,Default_Handler

  .weak DMA0_Channel3_IRQHandler
  .thumb_set DMA0_Channel3_IRQHandler,Default_Handler

  .weak DMA0_Channel4_IRQHandler
  .thumb_set DMA0_Channel4_IRQHandler,Default_Handler

  .weak DMA0_Channel5_IRQHandler
  .thumb_set DMA0_Channel5_IRQHandler,Default_Handler

  .weak DMA0_Channel6_IRQHandler
  .thumb_set DMA0_Channel6_IRQHandler,Default_Handler

  .weak ADC0_1_IRQHandler
  .thumb_set ADC0_1_IRQHandler,Default_Handler

  .weak USBD_HP_CAN0_TX_IRQHandler
  .thumb_set USBD_HP_CAN0_TX_IRQHandler,Default_Handler

  .weak USBD_LP_CAN0_RX0_IRQHandler
  .thumb_set USBD_LP_CAN0_RX0_IRQHandler,Default_Handler

  .weak CAN0_RX1_IRQHandler
  .thumb_set CAN0_RX1_IRQHandler,Default_Handler

  .weak CAN0_EWMC_IRQHandler
  .thumb_set CAN0_EWMC_IRQHandler,Default_Handler

  .weak EXTI5_9_IRQHandler
  .thumb_set EXTI5_9_IRQHandler,Default_Handler

  .weak TIMER0_BRK_IRQHandler
  .thumb_set TIMER0_BRK_IRQHandler,Default_Handler

  .weak TIMER0_UP_IRQHandler
  .thumb_set TIMER0_UP_IRQHandler,Default_Handler

  .weak TIMER0_TRG_CMT_IRQHandler
  .thumb_set TIMER0_TRG_CMT_IRQHandler,Default_Handler

  .weak TIMER0_Channel_IRQHandler
  .thumb_set TIMER0_Channel_IRQHandler,Default_Handler

  .weak TIMER1_IRQHandler
  .thumb_set TIMER1_IRQHandler,Default_Handler

  .weak TIMER2_IRQHandler
  .thumb_set TIMER2_IRQHandler,Default_Handler

  .weak TIMER3_IRQHandler
  .thumb_set TIMER3_IRQHandler,Default_Handler

  .weak I2C0_EV_IRQHandler
  .thumb_set I2C0_EV_IRQHandler,Default_Handler

  .weak I2C0_ER_IRQHandler
  .thumb_set I2C0_ER_IRQHandler,Default_Handler

  .weak I2C1_EV_IRQHandler
  .thumb_set I2C1_EV_IRQHandler,Default_Handler

  .weak I2C1_ER_IRQHandler
  .thumb_set I2C1_ER_IRQHandler,Default_Handler

  .weak SPI0_IRQHandler
  .thumb_set SPI0_IRQHandler,Default_Handler

  .weak SPI1_IRQHandler
  .thumb_set SPI1_IRQHandler,Default_Handler

  .weak USART0_IRQHandler
  .thumb_set USART0_IRQHandler,Default_Handler

  .weak USART1_IRQHandler
  .thumb_set USART1_IRQHandler,Default_Handler

  .weak USART2_IRQHandler
  .thumb_set USART2_IRQHandler,Default_Handler

  .weak EXTI10_15_IRQHandler
  .thumb_set EXTI10_15_IRQHandler,Default_Handler

  .weak RTC_Alarm_IRQHandler
  .thumb_set RTC_Alarm_IRQHandler,Default_Handler

  .weak USBD_WKUP_IRQHandler
  .thumb_set USBD_WKUP_IRQHandler,Default_Handler

  .weak TIMER7_BRK_IRQHandler
  .thumb_set TIMER7_BRK_IRQHandler,Default_Handler

  .weak TIMER7_UP_IRQHandler
  .thumb_set TIMER7_UP_IRQHandler,Default_Handler

  .weak TIMER7_TRG_CMT_IRQHandler
  .thumb_set TIMER7_TRG_CMT_IRQHandler,Default_Handler

  .weak TIMER7_Channel_IRQHandler
  .thumb_set TIMER7_Channel_IRQHandler,Default_Handler

  .weak ADC2_IRQHandler
  .thumb_set ADC2_IRQHandler,Default_Handler

  .weak EXMC_IRQHandler
  .thumb_set EXMC_IRQHandler,Default_Handler

  .weak SDIO_IRQHandler
  .thumb_set SDIO_IRQHandler,Default_Handler

  .weak TIMER4_IRQHandler
  .thumb_set TIMER4_IRQHandler,Default_Handler

  .weak SPI2_IRQHandler
  .thumb_set SPI2_IRQHandler,Default_Handler

  .weak UART3_IRQHandler
  .thumb_set UART3_IRQHandler,Default_Handler

  .weak UART4_IRQHandler
  .thumb_set UART4_IRQHandler,Default_Handler

  .weak TIMER5_IRQHandler
  .thumb_set TIMER5_IRQHandler,Default_Handler

  .weak TIMER6_IRQHandler
  .thumb_set TIMER6_IRQHandler,Default_Handler

  .weak DMA1_Channel0_IRQHandler
  .thumb_set DMA1_Channel0_IRQHandler,Default_Handler

  .weak DMA1_Channel1_IRQHandler
  .thumb_set DMA1_Channel1_IRQHandler,Default_Handler

  .weak DMA1_Channel2_IRQHandler
  .thumb_set DMA1_Channel2_IRQHandler,Default_Handler

  .weak DMA1_Channel3_4_IRQHandler
  .thumb_set DMA1_Channel3_4_IRQHandler,Default_Handler
